Captain’s log: stardate  43421.9 The Vengeance Factor, a Riker (Jobathan Frakes) episode first aired on 20 November, 1989. The Enterprise is transporting Sovereign Marouk (Nancy Parsons) to a meeting with an offshoot tribe of her planet’s inhabitants, known as Gatherers. Picard (Patrick Stewart) is hosting peace talks between the troubled sides, and is hoping that…